I was privileged recently to be in a position to facilitate the reunion of Gerry Beddoes, one of ®Jaguar’s prime architects of ®Jaguar’s legendary quad-cam V12 engine with former ex-Jaguar colleagues Peter Wilson, Frank Philpott and Jim Eastick. For many years after Gerry’s retirement, he “fell off the radar” as far as contact with his former colleagues was concerned and it was such a pleasure to be able to reunite these gentlemen once again.
© Neville Swales – Gerry Beddoes (left) meets Jim Eastick for the first time in many years
© Neville Swales – Left to right – Gerry Beddoes, Frank Philpott & Jim Eastick share a few memories
© Neville Swales
We met at the home of Peter Wilson who treated us to a delightful afternoon tea 🙂
Memories of ®Jaguar
Gerry recalled …
“Like many before me and myriads after I was overwhelmed by the XK l20 when I saw it aged seventeen at the 1948 Motor Show (and still have my precious brochure). My admiration for the car and its engine were reinforced by a visit to the Swallow Road factory to see the cars being built as they wound their way through the wooden buildings of the old munitions plant. I was then in the early days of my Engineering Degree course and, to that point. had not decided where I should use my newly acquired skills. Following those visits I had no doubt and set about my studies with greater vigour. The next decision was how to persuade Jaguar to take me on. In this I was helped by a friend of my then girlfriends family, Peter Duncan, who was producer of the popular BBC Saturday evening radio programme. In Town Tonight. He was the proud owner of a Mk.5 and knew Bill Lyons and Bill Heynes, having interviewed them on his show. He was kind enough to contact them in late I950 to mention me as an enthusiastic but unskilled potential employee.
Original XK120 at Earls Court, London
Early the following year I. received an invitation from Bill Heynes to attend an interview with him in his office at Swallow Road and. on a cold morning in late March, my girlfriend (who by then was my ﬁancee) and l made our way by bus from our homes in Worcestershire to Coventry. Leaving her to pace up and down Burnaby Road in the cold I found my way to the Design Office and had a pleasant hour with Bill Heynes going over my ambitions and his requirements. I left with an offer of employment in the Experimental Department, assisting Jack Emerson in Engine Test, subject to my spending a weekend there to see whether he and I could hit it off together and also subject to mypassing my Finals that summer. Six weeks later I made my way back to Coventry to meet Jack Emerson. Claude Baily and my future colleagues in the wooden shed that was the Engine Experimental Office.
WM Heynes, Jaguar’s Chief Enginer from 1935, was Gerry’s boss. Here he presents Gerry with an award at the Rifle Club Dinner in 1954. To Bill’s left are Bill Young (drawing office) and Ted Barber (production control) – © Gerry Beddoes
By then the 1951 Le Mans engines were in full development and the two test beds on which all engine tests were made for production and race development were in use seven days a week. My face seemed to ﬁt and a start date of early August was agreed although this anticipated my examination results by several weeks. The Department I joined consisted of four – including me — Jack Emerson as Chief Development Engineer, me to record test results, calculate performance and draw graphs. Fred Kettle as Tester and Jim Eastick as his assistant. Jim was about the same age as me and had joined Jaguar as an lmprover, a kind of apprentice. Also sharing our ofﬁce was Wally Rheese who kept records for all Experimental Department activities. Engines were built next to the test shed by Jack Lea and Frank Rainbow in a corner of the general Experimental Shop. Phil Weaver was in charge of the vehicle section with Harry Case as Foreman, soon to be replaced by Bill Cassidy on his retirement. Ron (Soapy) Sutton had left shortly before my arrival to be replaced by Norman Dewis the following year.
The test house itself was an asbestos panelled shed set between two of the parallel wooden buildings of the ﬁrst world war shell ﬁlling plant and had two Heenan and Froude DPX 4 water brakes. Engines were cooled by passing the cooling water into a tank at the front of each test bench, the temperature of which was controlled by a tap water feed with the excess spilling over into the drains. All engines were then without oil scavenge pumps so oil cooling was by means of water sprays from a ‘U’ shaped pipe around each sump. Fuel was gravity fed from car fuel tanks high up on the wall which were ﬁlled from jerry cans carried up a step ladder. The exhaust system was also taken from a car and emerged from the rear wall through a hole knocked in the asbestos sheeting. All in all a Health and Safety nightmare!
Over the next months we tested everything from the l95l TT ‘C’ Type engines to 2 litre four and six cylinder XK engines, a militarized 3.4 for assessment by the Fighting Vehicle Research and Development Establishment at Chobham and an alcohol fuelled racing engine. This latter engine gave us some excitement on two occasions — tirstly when running it at close to 7,000 RPM. faster than attempted before. the rurbber bonded crankshaft damper failed when the rubber melted due to the energy absorbed from crankshaft vibration. The inertia ring dropped to the floor. ran across the concrete floor and stood against the wall. jumping up and down showering us with sparks. As there was no remote reading of engine parameters we were all standing beside the engine. without ear defenders. so failures like that made us jump pretty smartly. Later on the Company Fire Service had to be called out when sparks from the exhaust set alight packing cases left piled outside by the Service Department engine rebuild shop next door. I also accompanied Jack Emerson and Malcolm Sayer on C Type test days at MIRA and had the great excitement of a lap or two as passenger with Peter Walker. Transport to Mira on those occasions was one of the two Mk 6 cars. which were Mk 5 cars ﬁtted with the 3.4 XK engine.
One of Jaguar’s Engine Test Beds – © Gerry Beddoes
There were many visitors to our little ofﬁce and I would sit enthralled listening to Jack Emerson exchanging memories with Harry Weslake, Ginger Woods of SU Carburetors (both, like Jack Emerson, ex motor cycle racers)and others. I also remember Laurie Hathaway (nicknamed Baron Oswestry by Fred Kettle) for his very colourful choice of swear words spoken with an impeccable English accent.
Shortly after joining Jaguar I had become a Graduate Member of The Institution of Mechanical Engineers, which had (and still has) a very active Automobile Division Section in Coventry. In order to qualify for full Membership later on it was necessary for me to spend a two year Graduate Apprenticeship going through all areas of the company from manufacturing to staff areas. I was helped in drawing up a timetable by Mr. Green, the Apprentice Supervisor but Bill Heynes was. at ﬁrst, reluctant to have me leave the Engine Test Department However, he was a leading member of the Automobile Division and so could not refuse. So. in early 1952 I put on green overalls and found my way to Browns Lane. Manufacturing was in the middle of transferring to the new location although Design Engineering was still at Foleshill. Lorries would carry a machine, its operator and work in progress so that it could be dropped into position, connected up and restart production with a minimum of delay. My ﬁrst assignment was in the grinding section. making selector rods for the gearbox but shortly after I was given the opportunity to move to a new production line being installed to make the crankshaft for the Meteor engine used in the Centurion Tank. Jaguar had begun overhauling Meteor engines (a non supercharged development of the famous Rolls Royce Merlin aero engine) and testing them in cells adjacent to the Morris Engines Plant at Courthouse Green and, perhaps as a condition of permission to take over the ex shadow factory in Browns Lane. were to set up to manufacture complete new engines.
Claude Baily, whom Gerry worked with on numerous projects including the XJ13 quad-cam engine
Transfer lines were installed for cylinder blocks and heads and a separate linked line for cranks. I worked on the last of these with a near namesake, Jack Bedder as Setter. and took two crank forgings from one end to the other. setting up machines as we went. In contrast to the block and head lines which had new German Huller machines, our line was made up mainly from machines taken out of MOD storage so needed much renovation. One machine I remember had Russian nameplates on the controls, presumably intended for or even returned following support for Russian manufacture of Merlins during the war. Other machines were clearly American in origin after production there by (I think) Packard. Our two forgings made their way towards the end of the line and were almost finished when a stop was put to the whole project, the machines were stopped and later removed.
During my time in the machine shops the two foremen. Ted Gough and particularly Bill Ward, gave me much help. I moved on to the XK engine assembly line in September I952 and then to the vehicle assembly line. I even spent a couple of weeks on the line producing the C Type cars and remember a mockup of a single seat racing car being made nearby. Having toured most of the production areas I then moved into Bill Norbury“s area, the Service Department. About three weeks later l was surprised to receive a summons to Claude Bailey’s office in the Engine Design Office. Smoothing down my dirty green overalls I made my way there to be told that the company had been given a contract to design and develope a 9.25 litre V8 engine for military use but he was having trouble with balance calculations for the crankshaft — would I take it on. With all the conﬁdence of my 2l years I said “of course” and moved into the design office next day.
Jaguar 1952 Christmas Party
(left to right) Stan Paskin, Roy Kettle, Frank Denmee, Gerry Beddoes & Jack King- © Gerry Beddoes
The Ministry V8 Engine
9.25 litre “Ministry” V8
I joined two others who were preparing schematic drawings and beginning detailing- Bill Hayward, who was Section Leader. and Alec Forbes- and began work. In the following months I completed the crank design and went on to calculate all other aspects of the engine such as bearing loads, camshaft drive gears, connecting rod sections and valve gear and also to make some of the detail drawings. In those days we had no computers so every component weight, combustion pressure. inertia force andicrankshaft mass had to be calculated by slide rule or log tables. something I did for every ﬁfteen degrees of crank angle. For its time the engine was very advanced with four valves per cylinder, twin overhead camshafts in each cylinder head driven by gears, an enclosed ignition system to permit immersion and drives for an alternator. hydraulic pump and power take off.
The original version had a carburetor but later engines ran with fuel injection. Power output was targeted at 375 HP at 3750 RPM but both of these ﬁgures were exceeded as development progressed. Components for around seven engines were machined and testing carried out on the Courthouse Green test beds as well as at Chobham. My calculation reports were addressed to Claude Baily and copied to Bill Heynes and to FVRDE Chobham. Regular meetings were held with the Chobham engineers, Mr. Tafft and Mr. Semmonds. As my efforts with my slide rule became accepted I began to be asked to complete other design tasks for engine and chassis components.
Gerry Beddoes – © Gerry Beddoes
In early August 1952, just before the midsummer holidays Bill Heynes approached a few of us in the drawing office and asked whether anyone could stay at work to draw up a modified rear suspension for the C Type car. I volunteered as my wife and I had no committed plans for the break. As originally designed it had two blade type lower links connected to the transverse torsion bar and a single triangular upper link which was offset to the right hand side of the differential and inclined downwards towards the front of the car. Under hard acceleration this was under tension due to torque reaction from the axle and opposed the engine torque applied by the propeller shaft. Wheel loadings were kept the same and wheel spin minimized. This was effective in its objective as I had witnessed in acceleration tests at MIRA but provided poor lateral location when cornering giving uncertain handling. My task was to design, detail and see fitted twin upper links for braking and acceleration loads and a Panhard rod for lateral location. This was completed and the cars for the 1952 Goodwood 9 Hour Race were run in that condition, the car driven by Tony Rolt going on to win. Rear suspension for the later Light Alloy car and D Types followed the same design except for a triangular ‘A’ bracket to give better lateral location.
Light Alloy car and D Type
While design work for the Ministry engine was going on I became involved with a project for a successor to the C Type, known within the drawing office as ‘The Light Alloy Car’. I was to calculate stresses and determine sizes for suspension components and torsion bars. This brought me in close contact with Malcolm Sayer who was preparing layout drawings and who, like me, lived in Kenilworth. lt fell to me to prepare weight estimates so that cornering and braking loads could be determined and l followed on by completing detail drawings for many of the suspension components. During construction I got to know Phil Weaver and all the Racing Shop mechanics well. The layout was very similar to the later D Type and, like the ﬁrst D Types. was constructed from a 4% magnesium/aluminium alloy. This needed shielded arc welding and l remember the specialist from BOC training some of the Experimental ﬁtters in its use. Norman Dewis drove the car for road development. most of which was carried out away from public gaze at Gaydon airfield, then non operational but later to become a V Bomber base and later still a Rover and now Land Rover Engineering center. During one of his tests Norman had a front wheel hub seize up at high speed, which must have been memorable to say the least. The car was brought back apparently undamaged and l was very interested to see whether my wishbone designs had survived. They had but the mounting bracket for the rear bearing of the offside upper suspension arm had a crack about half an inch long. There was much discussion over the relative merits of various remedies such as running a bead of weld along the crack but in the end all that was done was to drill a small hole at the end of the crack and for testing to carry on. I think the high speed runs at Jabekke and road tests at the Rheims track in 195 3/ l 954 must have been made in this condition. Brave Norman!
Another of my tasks in l953 was to make preliminary studies for a V12 engine, based on two 2.4 cylinder heads. The crankshaft stiffness was a concern but it was felt that with a short stroke design giving good overlap of main bearing and crankpin journals a satisfactory engine could be built. l went on to make a quarter size drawing of the engine and gearbox for use in styling sketches for a large saloon car. I still have a copy of this drawing.
Gerry Beddoes played a part in Jaguar winning of the 1953 Le Mans through his work on the C-Types.
Following my work on the Light Alloy car (later given the number XKC 054) l worked with Malcolm on the D Type, making weight estimates and carrying out stress calculations for the suspension members. One feature that gave me some thought was the attachment of the front torsion bar to the lower wishbone where, instead of a bulky attachment in line with the rubber bearing the torsion bar was splined directly in an extension of the wishbone. This meant that as the wishbone moved the end of the highly stressed torsion bar was displaced, adding bending to torsional stresses.I concluded that the clearance around the splined end of the bar would permit a degree of movement and no excessive stress would result. This was born out in vehicle use and later on in the E Type which had basically the same front suspension..
The “Light Alloy” car of 1953. Gerry worked closely with Malcolm Sayer on this car.
Another project which occupied me was a 4-valve cylinder head design by Harry Weslake. This was unconventional in that instead of inlet and exhaust valves down opposite sides of the head inlet and exhaust alternated down each side, with each pair of inlets diagonally opposite in each chamber. Weslake had made layout drawings only and it fell to me to complete detail drawings for a prototype. This necessitated several visits to his establishment in Rye. always an entertaining day. He was a larger than life character and full of stories. His office window looked onto the sand dunes so he kept a loaded 12 bore shotgun standing in the comer to take pot shots at rabbits if they came too close. His practical knowledge of airflow in engines was enormous and, although we tried very hard, we could never equal the power he achieved from cylinder heads he had fettled. The 4-valve head design had one weakness in that the close spacing of valves imposed by the long stroke XK cylinder spacing meant that rocker arms instead of tappets had to be interposed between camshaft and valve instead of tappets. The geometry for these was not ideal and the prototype head suffered badly from scufﬁng of the cam face. Several attempts were made to overcome this, including a deposit of Stellite and alternative lubricants but only bench tests were made. These indicated that, although low speed performance was good, the extremely rapid air swirl at high speed was not beneficial.
The very first D-Type (XKC401) on the ramp in the Experimental Department (note no fin yet)
Another interesting exercise, prompted by the performance of the Mercedes racing cars. was a look at desmodromic valve gear. I drew a trial system of rockers operated by a single camshaft and a single valve rig was made. but the necessary cylinder head and cam drive changes were so great that little or no running was done.
Mk l 2.4
Drawing Office Staff – left to right – (unknown), Mac McKenzie, Gerry Beddoes, Laurie Hewitt, Frank Denmee & Jack King – © Gerry Beddoes
My services with a slide rule were again involved in what later became known as the Mk l 2.4 litre. As ﬁrst conceived this was to have an updated version of the 4 cylinder 2 litre engine, this time with a ﬁve bearing crankshaft. Early weight estimates were on this basis but, although not in time to stop a batch of ﬁfty cylinder blocks, engine tests showed that even with ﬁve bearings the four cylinder engine was not as smooth as required and with 2 litres capacity could not produce enough power. Stan Paskin was the designer for the front suspension and I worked with him to determine wishbone loads and sizes. The front suspension assemblies were to be supplied ready built up by Alford and Alder who also supplied Standard Triumph. Their Managing Director. whose name was Turner and their Chief Engineer, John Lind were very proud of their involvement with the Triumph Herald which had just been released and were keen to carry over some of its design features to the new Jaguar. The ﬁrst Mk l prototype was therefore built with screwed bushes for the suspension bearings and a geometry which placed the front roll center below ground level. This gave two problems ~ ﬁrstly excessive friction and second excessive roll. My job was to design the road springs to give the desired riding height but the friction meant that it was possible to push clown the front of the car. slowly release and get one ground clearance, then raise the car. release and get another 1% inches greater! This was soon corrected by the adoption of rubber bushes for the wishbone bearings. The second resulted in poor handling that no amount of development could cure.
Memo from Gerry to Claude Baily discussing what would form the basis of Jaguar’s
first V12 and one which would power the XJ13 Le Mans Prototype
After a few weeks it became clear that changes were urgently required and, one Friday afternoon Stan Paskin and I were given the task of revising the design. Such was the speed with which change was possible that by the time we went home, much later that evening, a new geometry was determined. dimensions for a new vertical link decided and someone dispatched to obtain pieces of EN 16 steel from which they could be machined. Harry Hawkins and Bill Cassidy-“s machinists worked through the weekend. as did Stan and l._ so that by midday Monday Bill Heynes could drive the modiﬁed car. By Tuesday morning the new design had been released and drawings issued. l do not think that today’s rapid prototype systems could have done any better.
The rear suspension also went through some development changes. The initial design had cantilever leaf springs that not only acted as lower radius arms but also provided lateral location for the axle. The rubber mounts at the front and center of the spring allowed so much lateral movement that. together with the front end problems, handling was uncertain at very least. The solution was addition of a Panhard rod but space limitations meant that it had to be very short and to the offside of the differential so that geometry was not ideal and loads on the mountings were high.The ﬁnal change was to the design of the upper wishbone. All the prototypes had a fabricated wishbone duplicating a pressing that wrapped around the upper ball joint and was curved to miss the telescopic shock absorber. As built up by welding sections of angles and plate these had given no problems and drawings had been released for production tooling. However, when the ﬁrst ‘off tools’ components were put on pave road test the decrease in metal thickness and generous radii resulting from pressing allowed the wishbone to fold in the middle. Something close to panic ensued as l00 sets of front suspension crossmember assemblies were being built for the ﬁrst production vehicles. These were committed for the initial release and could not be delayed so, as a temporary ‘ﬁx’ all wishbone sections were doubled by the addition ofa stiffener made from a second wishbone pressing with the ends cut off, spot welded in piggyback fashion. The ﬁrst cars left the factory with this temporary ﬁx but were soon modiﬁed by the substitution of a new wishbone assembly that Stan and I drew up.
© Gerry Beddoes
Shortly after the ﬁrst prototype 2.4 car was put on the road life at Jaguar was enlivened by the arrival of Bill Nicholson. He was an ebullient Irishman who had left BSA motorcycles after several years as leader of their successful trials and scramble team. Soon after his arrival he was ticked off by Sir William for driving the only 2.4 prototype up and down Browns Lane in clear view from the offices at speeds well over any legal limit. He survived that time and was more careful where he drove like that again. As a road development engineer he was given the job of debugging the application of power steering to the Mk 9 and 2.4 litre cars. I was to look after the Design Office aspects such as mounting of the pump, reservoir and piping, together with liason with Burman Gears who made the steering boxes. I got to know Bill well over the next few months and liked his irreverent approach to everything. even if it made life a little difficult at times. One day we were returning from a visit to Burmans and I commented. as he rounded the traffic island at Meriden with his usual gusto, that the local citizens would have been well woken up by the squeal of the tyres which prompted him to do a further three or four laps of the island at ever increasing speed and smoke level. A ride with him in his immaculate MG was an experience never to be forgotten!
ln the mid l950s the power race in America was in full swing and Bill Heynes was keen to assess any means to raise the power and torque of the XK in all its variants. One project I was involved in was turbocharging. At that time it was being introduced for diesel engines and we worked with Holset for a while to match one of their smaller units to a 3.4 engine.I had several visits to their Huddersﬁeld factory where their Managing Director, P.J.F.Croset, was a keen Jaguar owner. Some test bed work was carried out but, in the absence of suitable fuel systems and waste gate valves to limit maximum boost pressure, no roadworthy system emerged. For trips such as those to Holset or to Weslake at Rye I drove one of the two 2.4 l prototypes retained in Experimental. RVC 591 and 592.They were both a great contrast to my own car, a well prewar Morris Ten.
Gerry still has his drawing he made when a V12 engine was first being proposed by Jaguar. This quad-cam layout was later adopted for the XJ13 Le Mans project
Since for all this time I was still involved with the Ministry Engine project my call up for National Service was deferred. ln this I had a sympathetic supporter at the local ofﬁce of the Ministry of Labour and National Service who just happened to be Bert Hadley, a driver of the prewar Austin 750 racing car and several times a driver for Jaguar. Each year I would visit him, talk about Jaguar for a while. complete forms stating my reasons for deferment and go back to work for another year. At that time young men were liable for call up until the age of 26 years but when I reached my 25″‘ birthday Mr. Hadley stated that he could only grant me deferment for periods of three months at a time, and would not be allowed to grant three such periods. Accordingly I accepted the inevitable and, in spite of being by then married. buying a house and with a son, allowed myself to be called up to Army service with REME in October 1955.
Because of my motor industry experience I soon passed a trade test as a Motor Mechanic and used this to attempt to be posted to Chobham. where the Jaguar V8 engine was under development but this was not possible as the had no positions open to National Service recruits. I was therefore sent, after basic training, on a Leading Artisan Sergeants course at Bordon in Hampshire. This gave me training on all of the Army’s vehicles from tanks to bulldozers over 32 weeks and was great fun. However, two weeks from the end I passed a Selection Board and began another training course as an Officer Cadet at Mons Barracks in Aldershot. During my training there and later at Bordon I was constantly reminded by those who knew of my Jaguar connections that I was following Sir William’s son who had been commissioned in REME some months before. There were tales of his exploits such as driving his XKl20 around the hallowed area of the parade ground. chased by irate drill Sergeants.The last eight weeks before passing out were back at Bordon where my previous training stood me in good stead. One enjoyable week was motorcycle training under Jeff Smith, Bill Nicholson’s successor as the leading rider for the BSA scrambling team who had been called up shortly before and, not surprisingly, made a motorcycle instructor. Aﬁer passing out I had only nine months left to serve so the Army did not consider it worthwhile to send ‘me overseas and posted me to a Command Workshops in Bridgend. Our task there was to service vehicles from local units and to refurbish a large number of Bedford trucks from a nearby vehicle depot. I put my Jaguar experience to use by installing a test bed to run engines after rebuild. Eventually in October l957 I leﬂ Bridgend and rejoined Jaguar./em>
Return to ®Jaguar
Back in the drawing office I resumed my former task of “slide rule pusher’ and my first task was design of a crankshaft for the 3 litre racing engine. Experience with the 3.4 crank had shown that the maximum speed was limited by torsional vibration. The natural frequency for that crank of around 21.000 cycles per second meant that torsional stresses became excessive at engine speeds over 6.500 RPM. near the peak of the third order vibration. Racing cranks had already been stiffened by a larger front end diameter and enlarged rear crank web but this had not given a signiﬁcant increase in safe speed. The 3 litre crank, with its shorter stroke and greater overlap of journals was naturally stiffer and gave no trouble in use. That was not the case with all components of the engine however.
The connecting rods in early test engines were made from Titanium to reduce bearing loads and were carefully polished and crack detected. But this did not prevent a couple of spectacular failures on the test bed which nearly cut the aluminium cylinder blocks in two. Close examination of the broken parts showed that there were fine forging cracks present but these had been hidden by the very polishing operation intended to reveal them because of the way titanium alloys ﬂow under surface stress and fuse together to make a continuous skin. Later engines reverted to steel rod forgings.
Another problem arose with the valve gear where both camshafts and tappets were failing, often leading to the ruin of a whole engine. I made an analysis of the cam and valve train system and concluded that the failures arose because of the design of cam profile used. Jaguar had always had cam profiles based on what was known as the three arc design where both ﬂanks and the nose of the cam were of constant radius. This made lift calculation easy (albeit long-winded with ten ﬁgure log tables as I well knew) and also contributed to good breathing by virtue of a fat lift curve resulting from instantaneous changes in acceleration. As the contact point moved up the ﬂank of the cam on valve opening the acceleration is high and almost constant over between ll and 12 degrees of camshaft rotation but when contact moves on to the nose this changes instantaneously to a lower deceleration so that the valve arrives at full lift where it is instantaneously at rest. On closing the valve and tappet are accelerated towards the valve seat until the contact point moves off the nose and the ﬂank now suddenly begins to decelerate them to close the valve at low velocity. These suddenly imposed acceleration changes and the resulting load (amounting to a theoretical half a ton at the design speed of 8,000 RPM) created shock loads on camshaft and tappet leading to failure after less than an hour at high speed. Following some study of available literature I devised a cam proﬁle that had its point of highest acceleration at only half of the tappet face radius and had a smooth transition from acceleration to deceleration. I was also able to alter the shape of the acceleration curve to permit use of a high rate valve spring with a high natural frequency which was much less prone to surge. On a test rig my design survived 24 hours at the equivalent of 8,000 RPM engine speed without failure but. on a straight substitution for the standard cam. did not give the same power due to the slightly ‘softer’ proﬁle. As the 3 litre racing programme came to an end shortly after, my ideas on cam design went no further.
Mk 10 ( Zenith ) Project
This did not mean that I had nothing else to do as. one moming I saw two of the Body Ofﬁce draughtsmen carry a full size plywood proﬁle of a large car into their area and trace around it onto their wall mounted board. This was the start of the Zenith project later to be the Mk 10 saloon and I was to design the front suspension and crossmember. It was immediately clear that the whole proﬁle needed to be raised as ground clearance under the engine and rear seat headroom were inadequate. I was not involved in the discussions with Sir William but I understand that they were not easy! However. he relented a little and the bonnet line was raised enough to ﬁt in the XK engine if a new sump was designed. However this left much less space below for the suspension crossmember, at least as a pressed steel fabrication like the 2.4 car. We were therefore forced to adopt a forged I beam from the start which lead to some difficulty in attaching the spring turrets and suspension arms. Many layouts were made and Bill Heynes was a constant visitor to my drawing board. At that time he was interested in rubber suspension springs and I paid several visit to Dunlop with sketches for discussion. I see from my note book that I calculated transverse leaf springs and torsion bars as alternatives but after many sketches and much doodling a fairly conventional coil spring layout was reached, detailed and put into production. lasting for many years as the 420G and becoming the basis for the Daimler Limousine. With only a small team in the drawing ofﬁce we worked long hours — overtime each evening and also weekends.
The fruit of the Zenith project – Mk10 in all its voluptuous glory
One Sunday morning I took my young son. then about four years old, with me and gave him a few pieces of scrap paper to doodle on. To my consternation in walked Sir William and I expected to be ticked off. Instead he immediately came over to us and proceeded to spend twenty minutes teaching him to draw patterns with a pair of compasses. He left me saying that he was pleased to see such a young recruit getting his hand in! In addition to these major projects I was still making design calculations for all sorts of components ranging from gudgeon pins to XK I50 rear springs to gear pairs for the gearbox. For the last of these I followed the guidance of Dr.H.E.Merrit, formerly the gear specialist for David Brown Gears and designer of the transmission system for the Centurion tank. As a consultant he was in demand for many industries and was a great help to me. Bill Heynes was never slow in calling on expert outside advice if needed and also recruited people who took his fancy. In the Body Drawing Ofﬁce there was one of the Van den Plas family from Belgium who worked as a stylist for a few years – very short sighted with thick spectacles but able to make beautiful drawings, even if he could not see both ends at the same time! I had as my assistant a Polish Engineer. Tadeusz Sokolowski, a graduate from Warsaw University in I938 who had spent all of the war years in ﬁrst Russian and then German prison camps who wrote to Heynes setting out his story. Several young engineers were also put under my wing for a while to gain experience, among them being Graham Robson, later to become a successful writer and motoring journalist.
Associated Engineering Group Research
By 1961, nearly four years after returning from National Service I was becoming restless. Although I enjoyed my job (who would not!) l was a little frustrated in that nearly all of my work in design calculations relied on estimated or even guessed input loads. Jaguar had no means to measure dynamic loads although the means to do so were becoming available. When I saw a job advertisement in the local paper for qualiﬁed engineers to join a new research center not far away I was tempted to apply. Accordingly, in the autumn of that year I joined the Associated Engineering Group Research Centre at Cawston, near Rugby as their motor industry engineer, much to the annoyance of Bill Heynes. The Centre had been established after a Government Report had been published showing the proportion of turnover allocated by companies to R & D in major countries around the world. Britain came near the bottom of the table and the AE Group decided. if R & D was what was needed to improve their prospects then they would have some. Accordingly, Cawston was set up and around I00 staff taken on with backgrounds in many ﬁelds such as mechanical engineering, electronics, metallurgy, physics and control engineering. Laboratories and workshops were lavishly equipped and I helped to install test beds with costly dynamometers. The only thing the AE Board did not provide was any directive on what we should do, this being left to the staff to make proposals.
After a few relatively minor projects I joined one of my colleagues in designing and developing an electronic fuel injection system. We had all the means required on site with an Electronics Laboratory headed by Mike Westbrook, later to be head of the Ford Dunton Electronics Laboratory and his deputy, Dick Skipworth. The starting point for our work was a paper by Bendix in USA who had announced a system in the mid l950’s that relied on gas ﬁlled valves. It did not prove reliable in service and was dropped. Later on, Bosch had announced their D Jetronic system. for which claims of power, consumption and emission improvements had been made. With that background, Board approval was obtained and we set about designing and making our own system from scratch. The colleague who had initiated the project was Ken Wallace, an inventive and persuasive individual. His persuasive powers were demonstrated when after some rig testing and single cylinder work we wanted to equip a road vehicle to assess driveability. His proposal was to buy an already fuel injected car so that a straight comparison could be made with a car on sale to the public — his choice, which was accepted by the AE Board, being no less than a Mercedes 300 SL Gullwing.We found a fairly low mileage second hand car at a London dealer and brought it to Cawston. The ﬁrst job was to record base line perfomiance ﬁgures on the test bed that took several weeks. Then the Bosch mechanical injection system was removed, the inlet manifold modiﬁed and our own system ﬁtted. Calibration and tailoring our system to the engine took a further few months and then came the exiting task of assessing road driveability. Ken an.d I used to use the car for normal transport overnight, leaving it outside our homes so that cold starting could be assessed. at least in UK conditions. Once the 300 SL was on the road we bought a more typical family car ~ a l.6 litre Ford Classic that became our main development workhorse. With a better inlet manifold but no other engine modiﬁcations this became a real ﬂyer while showing much improved tractability.
“Gerry’s” Mercedes 300SL Gullwing.
By 1964 we had gone through several design levels for all the individual components and had accumulated many hours of rig tests. Ken Wallace had left AE in circumstances I had better not describe and I was now the Chief Engineer for the project, ably assisted by Brian Croft. later to be Chief Engineer at SU Carburetors. We had installed an environmental test chamber for corrosion and other tests and had begun to equip a third car — this time a 3.8 Mk 2 Jaguar. Outside suppliers for some assemblies had given costs for volume and rough time scales for production and an AE Company chosen for assembly — Brico Engineering in Coventry. It was now time to reveal our work to our potential customers I therefore wrote to the Engineering Directors and Chief Engineers of all the UK car manufacturers inviting them to each spend a day at Cawston looking at our work and driving the Ford Classic. About fourth on the list. alter Ford, Aston Martin and Vauxhall came Jaguar and I played host to Bill Heynes and Wally Hassan. I think they were impressed but when I accompanied them in driving around the local roads I was surprised to be asked by Mr. Heynes whether I was happy at AE as he had a proposal to make to me. It so happened that I had some concerns over the future management of the project which had been put in the hands of the Brico board who, whilst very experienced in piston and ring manufacture and were developing great expertise in sintered metal. had no knowledge of electronics and electromechanical components. There were also growing concerns over the strength of our patents. particularly as Bosch had ﬁled several patents with very broad claims which seemed to cover almost any means of fuelling an engine. I explained this and Mr. Heynes said he had a project that might interest me — acting as liason engineer between Jaguar and the designer of a transmission system in which Jaguar had an interest. I accepted his offer and once again resumed my familiar journey to Browns Lane each moming. I was given an office next to Claude Baily, sharing his secretary. and was put on the Executive payroll, enabling me to buy a new Jaguar each year at ex factory price. a perk I much enjoyed! This beneﬁt continued for three years and I had successively a 3.8 MkII, a 3.4 S Type and a 340 until the merger with Leyland when the contrast with their executives driving Austin Maxis and us at Jaguar became too much to bear and we all had to join the company car hire scheme.
Badalini Transmissions Ltd
The following account is based on my understanding of events and my sketchy knowledge of the background to them.
The transmission concerned was an inﬁnitely variable hydrostatic system, designed by an Italian Giovanni Badalini who had a development workshops in Rome and a drawing office managed by his brother in Milan. Jaguar interest in his work was stimulated by Digby (Digger) Cotes-Preedy, then Sales Manager for Cam Gears. a manufacturer of steering gears for car, truck and tractor use. Digger was a pilot in the Battle of Britain, ﬂying Blenheim ﬁghter/bombers and ﬂew all through the war, ending by flying ground attack in a Typhoon. After demobilization he joined Dunlop Aviation as their test pilot for aircraft brakes and flew most of the British post war civilian aircraft. When that career ended he joined Cam Gears. One of his customers was International Harvester in Doncaster and, during a visit there, Digger was told by Joe Ziscal the American Chief Engineer that he was disappointed by his US head ofﬁce which had prevented him from continuing development of a prototype tractor fitted with a Badalini transmission. He had commissioned this from his own budget, had it manufactured in Italy and given it exhaustive tests in England. Ziscal believed the system had some promise and wondered whether Cam Gears might be interested in taking on the rights. Their Managing director Mr. Douglas Leese agreed and took an option on promotion of Badalini’s patents. He and Digger approached all potential customers. naturally including Jaguar. After some assessment of the Badalini”s prototypes by Bill Heynes and Dr. Tait, the very experienced engineer who joined ®Jaguar when Daimler was purchased, an order for two Jaguar sized units was signed in October 1962.
D’Attilia and Franco of Badalini Transmissions
work on a first prototype ®Jaguar gearbox in Badalini’s Rome workshop – © Gerry Beddoes
Two other companies which showed interest were Ford and Massey Ferguson and. in January the following year, Ford too placed an order through Cam Gears for two transmissions to suit their Cortina car. In March I963 Cam Gears and Jaguar set up a jointly owned British company, both having a 48% share with the Italian company Cambi Idraulici Badalini having the remainder. As part of this deal, Badalini granted the UK company rights to develop and manufacture transmissions for car. truck, tractor and industrial use throughout Europe and North America for their own and other company’s use. It was also agreed that Badalini Transmissions would set up a design and development facility to support Badalini’s own rather meagre workshop in Rome. Badalini too had a remarkable history. having been called up in the Italian Air Force as a pilot at the beginning of the 1939 war. He won Italy’s Gold Cross for low-level daylight bombing of Malta but was shot down on a later mission, crashing into the Mediterranean with a badly injured back. After a day in his rubber dinghy he was picked up by a British rescue boat and taken to hospital in North Africa. By the time he left hospital with his back in a steel brace Italy had capitulated. with many of their forces opting to join the Allies. Badalini volunteered to join a Royal Air Force Wing being established with all Italian crews but. not unsurprisingly. was required to demonstrate his loyalty to a new cause before being let loose with an aircraft full of bombs. Badalini was therefore dropped by parachute in Northem Italy on a mission to aid the partisans and, on completion. made his way south to the front line and walked across by night to claim his RAF wings. He then won a bar to his Gold Cross bombing the Germans. During the l950’s he built up his transmission business and had licensed the German company Flender to manufacture industrial drives in Germany and Italy. MV Augusta had made a motorcycle transmission to his designs that had been used for street circuit racing which had come to the notice of Honda. They made their own version to be used in a de luxe scooter, using published infomiation, but had run into serious problems when committed to production. They were apparently compelled to contact Badalini and he went to Japan, overcame the problems and the scooter went into production under the model name Juno. In all this he had the backing of an Italian industrialist, Count Vaselli. who appointed one of his legal staff, Dr. Angelo Lauria to guide him commercially. It was Angelo who met me when I ﬁrst went to Rome to meet Badalini. In his small workshop in the outskirts of the city he had several dusty examples of earlier applications of his ideas including two MV Augustas, a Fiat car and the ex International Harvester tractor. There were also two Ford Cortinas, equipped under contract from Ford Basildon and in full use for development. Ford had, like International, looked at many options for inﬁnitely variable transmissions and decided that Badalini’s ideas warranted investigation. Several companies had investigated hydrostatic transmissions and many papers had been written about them. Industrial variable ratio drives were in production to a number of designs. The simplest had an engine driven hydraulic pump supplying oil to a motor in a circuit. speed being controlled by varying the capacity of either pump or motor. This meant that in “top gear’. the most common condition for a motorcar transmission, oil ﬂow was at a maximum. which lead to poor efficiency. Badalini had overcome this, using swash plate pumps and motors. by mounting the pump swash plate on the motor casing. This meant that engine torque was always transmitted mechanically to the output shaft, the hydraulics providing the speed reduction for ‘lower gears’ and additional torque. In ‘top’ gear the motor capacity was reduced to zero so that the hydraulic circuit was stalled and all the transmission internals rotated together.
By putting the pump inside the motor the motor capacity was nearly treble that of the pump so that. for the same swash plate angle. the output torque was nearly four times the input in ‘bottom’ gear. (See Appendix for details). One consequence of the large diameter motor swash plate was the high rubbing speed for the thrust bearing and this proved to be the most intractable problem in the following years. The Ford prototypes had a ball bearing motor swash plate but this was noisy and I was advised by bearing specialists later that ball or roller bearings would not be quiet or durable enough. In early I962 the Ford cars were shipped back to Coventry but soon Digger and I drove them back to the old Ford Engineering Block at Rainham. Our contact there was Alf Haigh, then Chief Engineer, Transmissions. and a young engineer Peter Beattie. Ford continued work on their prototypes for a few months and we had one back in Browns Lane for a while but as they were by then to a superceded design they suspended further work. I suspect that. following Jaguar involvement, they did not wish to be beholden in any way to a rival motor manufacturer.
Prior to my rejoining Jaguar a Honda Juno scooter had been shipped over from Japan and had been tested and examined by Ford and this was now brought up to Coventry. I rode this home several times and even saw Sir William, clad in a riding mac and tweed cap ride off one evening back to Wappenbury! He enjoyed his retum to two wheels, as the Juno was great fun. Control was by a normal throttle twist grip for the right hand and a similar left hand twist grip that controlled the ratio. An impressive getaway could be achieved by winding the left grip away for the lowest ratio and the right grip towards for full power. The ‘clutch.’ function was automatic, controlled by rising oil pressure as the priming pump speed increased. As the engine revs rose to the maximum of 8.000 the left grip could be slowly rolled back to maintain acceleration. LI p to around 40 MPH it would beat most cars but the 375cc ﬂat twin engine, although rewing to 7600 RPM, did not give it motorway performance.
Early visitors to Badalini’s workshop in Rome were engineers from Massey Ferguson. They had been approached by Digger following the withdrawal of International Harvester and were keen to follow up the successful trials at Doncaster. They drove the tractor around the area and left us with a long list of engines and performance requirements covering agricultural and industrial applications. Badalini produced outline drawings and, on my return to Coventry. I began to reﬁne them in discussion with Mr. Bisset and Mr. Yapp of Massey. Coincident with this Badalini had produced drawings for a revised car transmission. this time of a size to suit the 4.21 Jaguar engine. and he was soon authorized to begin manufacture. Badalini had no test bench capable of running a Jaguar sized unit so I had a Mk l0 shipped out via our Rome Distributors, joining it myself on arrival. As many features of the transmission and control system were new the unit was in and out of the car many times, sometimes twice in one day. Badalini had two ﬁtters working in Rome, d’Attilia and Franco. They were sculptors in metal and made most of the components on one lathe and a pillar drill.
Badalini – tractor demonstration – © Gerry Beddoes
Badalini and l drove the Mk l0 around the suburbs of Rome, sometimes leaving a trail of oil behind us. slowly improving the performance and control and putting together a list of design changes to remedy problems. In due course Badalini combined these into a new design for which detail drawings and manufacture would take place in Coventry. I therefore engaged a draughtsman, Ray Kitchen, who had previously worked in a contract drawing office and had wide experience. Ray picked up Badalini’s ideas quickly and was soon producing a steady flow of detail drawings. As the list grew I cleared them with Badalini and set about organizing manufacture. Some parts were made ‘in house” but most were sub-contracted to local companies including Harry Ferguson Research and Henry Meadows, then part of the Jaguar Group. I also had assistance from outside companies for anodizing and other special finishes. When ﬁnished parts began to arrive l needed someone to put them together and an area in which to work so was allocated Stan Hanks, a ﬁtter in the Experimental Department and one of the ten engine test cells which had space for an assembly bench and the capacity for testing the unit before installation in a car. The Mk X car was no longer needed in Rome and was shipped back to Browns Lane for this purpose.
In parallel with all this the Massey Ferguson design had been agreed with their Management and we were given the order for preparation of detail drawings. Ray Kitchen set about the task of making these and I met regularly with Mr. Yapp and Mr. Bisset to tackle minor problems of installation and performance. At intervals major reviews of the project were held, either in Coventry or in Milan, to agree details of the range of variants necessary to cover a range of tractors for agricultural and industrial use. These were usually chaired by Dr. Bottrill. Massey Chief Engineer and attended by Badalini. By 1967 the number of variants had resulted in such complexity that cost estimates by Massey and GKN, their chosen sub contract manufacturer. and the project was close to ending. Badalini, who had always protested at the growing list of variants, proposed a simpler design based on the car design and initial schemes were prepared at Jaguar. Following acceptance of these by Massey plans were made to begin detail drawings with a target oflate 1968 for prototypes.
At Browns Lane we were busy developing the completed Mk X transmission and slowly overcoming control and mechanical problems. The most intractable of these were the motor swash plate and noise, but progress was being made. Schematic drawings were prepared for a constant speed drive for engine accessories such as air conditioning. alternator and power steering pump. This would reduce the power absorbed by these at high speeds and permit the use of simpler and cheaper accessories. Mid 1968 brought bad news for us. following the absorption of Jaguar into British Leyland. Bill Heynes and I attended a meeting at Leyland to explain our programme and its current status to their engineers, lead by Dr. Fogg. overall BL Engineering Director. The reception given to us was not promising and there was no enthusiasm for investment in manufacturing a transmission exclusively for Jaguar, let alone one for Massey who competed with BL’s own tractor sales. I returned to Coventry full of gloom and gave the sad tidings to Digger. He set about exploring other possible collaborators and we even took interested engineers for trial drives in the Mk X, sneaking out quietly for a final ‘test run‘. One memorable meeting resulted from these attempts to interest other Companies when Digger contacted BRD, the manufacturer of transmission shaﬁs. One of their Board Members was J.J.Parkes. Chairmen of Alvis in Coventry and with his help a meeting was arranged in Milan, unknown (or ignored) by Bill Heynes at the time although he would probably have supported it. A dinner that evening was dominated by pilots and ex pilots as the attendees were Mr. Maxwell, BRD MD and an ex bomber pilot. J J Parkes. a private pilot although then in his 70s, Count Vaselli, associated with the Italian Schneider Trophy Team in the early l930s, Digger. Badalini and myself. T o add even more interest we were joined by Mr Parkes’ son Michael who flew himself down from Le Mans where he had won the 24 hour race the previous weekend for Ferrari for whom he was their Chief Development Engineer. I hardly said a word all evening and just sat there spellbound at the tales of war and peacetime exploits.
All of this came to nothing, and in August 1968 the whole project was wound up. The transmissions were scrapped, the car returned to the Experimental ﬂeet and the test bed reclaimed for engine development. Digger stayed on for a while but left at the end of the year, Stan Hanks. the ﬁtter moved into the Experimental Shop and Ray Kitchen. the draughtsman into the Engine Drawing Office. It was altogether a very sad time and I was sorry to lose contact with Badalini and Angelo Lauria who had by then become close friends.
Back to ®Jaguar Engineering
For me however, the closing of one door opened another for, at that precise time. October I968 Claude Baily retired and Harry Mundy moved into his position as Chief Designer and Executive Director, Power Units. I was appointed Chief Development Engineer. Power Units, working alongside Ron Burr. Chief Designer and Trevor Crisp. Chief Emissions Control Engineer. My deputy was George Buck with Frank Rainbow as Engine Build Foreman and Jim Eastick as Test Foreman. Development engineers were Frank Philpott, Ian Bush , David Scholes and Bob Alsopp with Ray Townsend looking after transmissions. For the next eight years I enjoyed their support in continuing development of the XK engine in various forms and completing development of the V12. Projects I covered included the Slant 6, a 6.41 V12 and liaison with MVEE. the Ministry of Defense Establishment at Chobham, on development of the 4.2 XK for use in the Scorpion tank.
The Slant 6 was literally a V12 with one bank cut off and tun ﬁrst with a standard two valve head then later with a 4 valve design. This was a bulky engine and grew into the 3.6l and 4.0l engines which went into production in the XJS and saloon cars. The 6.4 V12 was built by a 20% increase in the standard 70mm stroke, which in turn required an aluminium packing plate on top of each bank to match the taller liners. Performance was exhilarating to say the least, with only about 6 or 7% increase in power but close to 30% more torque which was over 400lbft from 1200 RPM to the top of the power curve. On the road it was hardly ever necessary to change gear as, even at over 100 MPH, the back wheels of the E Type we put it in would shudder with wheel spin. It was later installed in Harry Mundy’s XJ12 car.
Soon after I took up my position we became interested in electronic fuel injection, particularly for the V12 as obtaining satisfactory performance from the carburetted version was not easy and because of my experience at AE Group Research I looked after initial installation and liaison with ﬁrstly Lucas and later Bosch. This was in fact the second time I had been involved with PI as. in the mid 19505 I had designed a gear drive from the XK camshaft for the Simmons injection system then promoted by SU. It was soon replaced by the Lucas system used successfully in racing. The better breathing obtained with a PI manifold gave much better performance and I recall seeing 150mph on the calibrated speedometer of an XJ 12. I had a lot of contact with Lucas, not only with their fuel injection department but also with the ignition department sorting out some of the problems with the Opus Ignition system ﬁtted to the V12. Temperature was a major concern as the control box was ﬁtted in the center of the Vee on the cover over the distributor drive shaft. On the E Type. which had a rather ineffective oil cooler, temperatures could exceed 150 C and early units failed due to components melting.
Later on I did the ﬁrst installation of the L Jetronic system from Bosch in a V12. intended for the American market, as this was the ﬁrst system that could incorporate exhaust gas sensors essential for efficient use of catalysts. In about 1973 we got to hear of Michael May and his high compression combustion system and this seemed to offer us a chance of improving the V12 fuel consumption at a time when large, thirsty engines were considered antisocial. Harry Mundy met him and decided to investigate his claims. I went to Rolle, in Switzerland, where he had his workshop and spent a few days watching his experimental techniques to get the desired air movement and making a rough sketch of the combustion chamber shape needed. On my return this was drawn up and prototype cylinder heads cast. We could not quite achieve the very lean air/fuel ratio that May had forecast but nevertheless went ahead with what became the HE V12.
During my years as Chief Development Engineer there were several problems which were difﬁcult to solve and which were very embarrassing. The ﬁrst of these was a spate of crankshaft bearing failures after modest mileages. Together with Vandervell engineers we looked at every factor involved and eventually traced the problem to the introduction of high speed grinders in the Radford machine shop. These had excellent control of size, roundness and surface roughness but, with a grinding speed of around 15.000 ft.per minute, produced a small degree of smearing at the surface which was not completely removed by subsequent lapping. This left tiny projections which lifted in running and created a file which quickly destroyed the bearing. Changes to the grinding and lapping procedures overcame the problem but not before a number of customer failures.
A second problem was conﬁned to the 2.8 l engine where we saw an increasing number of burnt pistons occurring at low mileages and with gently driven cars. After interviewing several angry owners a pattern emerged. Most had driven their cars in city or urban areas and then, on motorway driving, noticed a loss of power followed by a holed piston and lots of smoke. One failure happened to a car delivered to a dealer in late November where it was kept in the showroom until the ﬁrst of January to get the later year registration. Whilst there it was moved occasionally for short distances to gain access to other vehicles. On the ﬁrst of January it covered only 50 miles when the piston failed. The oil and fuel companies gave us much help and we were eventually able to trace the problem to oil ash deposits laid down on the head of the exhaust valves during light running which then glowed when power was increased, igniting the charge in the cylinder well ahead of normal timing which rapidly raised temperature and pressure leading to piston failure. A permanent solution was for the oil companies to limit the ‘sulphated ash’ content of their lubricating oils so that critical deposits were not formed. We never uncovered the real reason why the 2.8 l was so sensitive to this whereas the similar 4.2 I was not.
By 1976 ®Jaguar had become part of ‘Ihe Large Car Division’ of British Leyland and, following the Ryder Plan, was beginning to lose it’s identity. I was involved in discussions of a new Technical Centre that would handle all of the BL range with drafting and development facilities shared by all. Jaguar would have only a few dedicated engineers and they would have to compete for use of these facilities. In common with many others I was very depressed at this prospect so, when I was approached with a job offer as Product Engineering Director of TRW Valves I accepted. From being responsible for all components of one engine range I became involved in one component for many engines, ranging from lawnmowers through road vehicles to marine diesels, in UK and overseas. ®Jaguar became one of my customers and I contributed to all their engine programmes, encouraged the adoption of lighter valves which culminated with the 7mm stem diameter valves in the V8 and V6 engines. My involvement with Jaguar extended therefore from beginning to end of my working life, starting and ending with a V8 engine, and I retain many, many happy memories. I count myself as extremely fortunate that I was part of the ®Jaguar team during such an exciting period of the company’s growth and was given the opportunity to work on such a variety of projects,something today’s young engineers can seldom match.”